reactor-validate

<button class="secondary button" id="mobileMenuButton" href="#mobile-menu">
    <div class="mobile-menu-icon"></div>
    <div class="mobile-menu-icon"></div>
    <div class="mobile-menu-icon"></div>
</button>

<!-- Should perhaps be: -->

<button class="secondary button" id="mobileMenuButton" href="#mobile-menu">
    <span class="mobile-menu-icon"></span>
    <span class="mobile-menu-icon"></span>
    <span class="mobile-menu-icon"></span>
</button>